116 lines
3.2 KiB
C++
116 lines
3.2 KiB
C++
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_RUNTIME_ARCH_X86_CONTEXT_X86_H_
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#define ART_RUNTIME_ARCH_X86_CONTEXT_X86_H_
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#include <android-base/logging.h>
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#include "arch/context.h"
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#include "base/macros.h"
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#include "registers_x86.h"
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namespace art {
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namespace x86 {
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class X86Context final : public Context {
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public:
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X86Context() {
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Reset();
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}
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virtual ~X86Context() {}
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void Reset() override;
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void FillCalleeSaves(uint8_t* frame, const QuickMethodFrameInfo& fr) override;
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void SetSP(uintptr_t new_sp) override {
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SetGPR(ESP, new_sp);
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}
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void SetPC(uintptr_t new_pc) override {
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eip_ = new_pc;
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}
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void SetNterpDexPC(uintptr_t dex_pc_ptr) override {
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SetGPR(ESI, dex_pc_ptr);
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}
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void SetArg0(uintptr_t new_arg0_value) override {
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SetGPR(EAX, new_arg0_value);
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}
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bool IsAccessibleGPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCpuRegisters));
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return gprs_[reg] != nullptr;
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}
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uintptr_t* GetGPRAddress(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCpuRegisters));
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return gprs_[reg];
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}
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uintptr_t GetGPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfCpuRegisters));
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DCHECK(IsAccessibleGPR(reg));
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return *gprs_[reg];
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}
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void SetGPR(uint32_t reg, uintptr_t value) override;
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bool IsAccessibleFPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfFloatRegisters));
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return fprs_[reg] != nullptr;
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}
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uintptr_t GetFPR(uint32_t reg) override {
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DCHECK_LT(reg, static_cast<uint32_t>(kNumberOfFloatRegisters));
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DCHECK(IsAccessibleFPR(reg));
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return *fprs_[reg];
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}
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void SetFPR(uint32_t reg, uintptr_t value) override;
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void SmashCallerSaves() override;
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NO_RETURN void DoLongJump() override;
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private:
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// Pretend XMM registers are made of uin32_t pieces, because they are manipulated
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// in uint32_t chunks.
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enum {
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XMM0_0 = 0, XMM0_1,
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XMM1_0, XMM1_1,
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XMM2_0, XMM2_1,
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XMM3_0, XMM3_1,
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XMM4_0, XMM4_1,
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XMM5_0, XMM5_1,
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XMM6_0, XMM6_1,
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XMM7_0, XMM7_1,
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kNumberOfFloatRegisters};
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// Pointers to register locations. Values are initialized to null or the special registers below.
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uintptr_t* gprs_[kNumberOfCpuRegisters];
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uint32_t* fprs_[kNumberOfFloatRegisters];
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// Hold values for esp, eip and arg0 if they are not located within a stack frame. EIP is somewhat
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// special in that it cannot be encoded normally as a register operand to an instruction (except
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// in 64bit addressing modes).
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uintptr_t esp_, eip_, arg0_;
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};
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} // namespace x86
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} // namespace art
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#endif // ART_RUNTIME_ARCH_X86_CONTEXT_X86_H_
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